[can someone write ]a letter from the perspective of a british soldier about the boston massacre

The correct answer is:  

B. The number and population of cities increased rapidly.

Population migration from rural to urban areas is a defining characteristic of the Industrial Revolution. Before that, most Europeans remained on small farms in rural regions. Many migrated to the urban areas to find work,  better pay and better quality of life. Soon, half the population in England lived in cities, and by 1900 all Europe followed the trend.